Lightweighting Aircraft Bracket Design: How Potez Aéronautique Achieved Major Weight Savings
The Part
An aircraft structural bracket for the Falcon 6X door assembly, developed in partnership with Potez Aéronautique, a leading French aerostructure supplier. The initial design was a two-part machined assembly, and the engineering team's objective was to consolidate it into a single additive manufacturing part, with topology optimization and full DFM compliance delivered within the concept phase.
The Challenge
Aircraft brackets number in the thousands per airframe, making their cumulative weight a significant lever for fuel efficiency and emissions targets. Conventional bracket optimization requires sequential workflows across multiple software tools: FEA to identify load paths, CAD to reconstruct the topology, DFM review to check manufacturability, then iteration when any step identifies a conflict. Each cycle consumes days, and the final geometry reflects how many cycles the schedule allowed rather than what the load environment actually required.
Potez Aéronautique's team needed to evaluate additive manufacturing against machining in a single exploration, with structural validation and DFM compliance both integrated from the first iteration, rather than enforced as successive post-process steps.
The Approach
The engineering team integrated topology optimization, Simulation-Driven Design, and Manufacturing-Driven Design into a single Cognitive Design workflow, enabling structural refinement and AM manufacturability constraints to operate simultaneously. After topology optimization, an additional SDD pass continued reducing mass and improving stress distribution in regions the initial optimization had not fully addressed. The contribution of that second pass is quantified separately in the case study.
The case study documents the full three-stage workflow, the SDD post-optimization pass results, and the comparison data against both conventional CAD and topology-optimization-only approaches.
Key Results
- 30% weight reduction versus the machining-optimized design baseline
- 3x faster engineering lead time, 84 hours reduced to 28 hours
- 8% additional stress reduction achieved through SDD refinement after topology optimization
The case study includes the three-stage workflow breakdown, the SDD post-optimization contribution, and the quantified comparison against both conventional and topology-optimization-only methods.
Why It Matters
When SDD runs after topology optimization rather than as a separate manual step, it continues to find mass and stress improvement that the initial optimization left unexploited. The results reported here reflect both stages combined, not just the topology output.
Download the case study to see the full three-stage workflow, the SDD contribution to the final result, and the method comparison table across all three approaches.
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Using Cognitive Design's integrated topology optimization and simulation-driven design workflow, Potez Aéronautique achieved a 30% mass reduction compared to an optimized bracket designed for CNC machining, alongside an 8% stress reduction after topology optimization. The full design exploration and manufacturability validation was completed in 28 hours, three times faster than equivalent traditional CAD methods.
Manufacturing-Driven Design in Cognitive Design embeds process-specific constraints directly into the optimization loop from the first iteration, ensuring every generated concept is manufacturable. For aerostructure suppliers like Potez Aéronautique, this eliminates late-stage manufacturability surprises that typically require redesign, supplier rework, and program delays under EASA certification frameworks.
Combining topology optimization with simulation-driven design allows engineers to first generate an optimal material layout, then refine material distribution using stress analysis inputs to further reduce mass while maintaining structural performance. This two-phase approach, fully integrated in Cognitive Design, outperforms running topology optimization alone, particularly for aircraft structural brackets with complex multi-axial load cases.
Yes. Cognitive Design's Design Explorer logs every design iteration and its associated performance metrics, including mass, stress, safety factor, cost, and manufacturability score, throughout the exploration, creating a full traceable record of the design decision process. This audit trail is directly relevant for aerospace suppliers operating under EASA and FAA design assurance frameworks that require documented engineering rationale for design choices.
The full design exploration and manufacturing validation workflow for an aircraft structural bracket was completed in 28 hours with Cognitive Design, three times faster than equivalent traditional CAD methods. This compression includes topology optimization, simulation-driven refinement, manufacturing feasibility validation, and back-to-CAD operations, all within a single integrated environment.
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